These are stainless steel Swedish fids. They are used primarily for separating the strands of three strand rope in order to make a splice.
Even though it is a pretty basic tool, they are invaluable for doing three strand splices. In our shop we also use them to extract the core of double braid ropes like double braid nylons, polyesters and even arborist climbing ropes like 24 strand and 16 strand. They also work great for opening up hollow braid rope like Tenex to make a brummel splice.
So overall, if you are getting into rope splicing at any level, you got to have one of these.
- 6 3/4" overall length
- 5/8" wide at the widest point and tapering down to the point
- Best for rope 1/4 to 3/4 in diameter
Here is a picture of one of our Swedish Fids in action. See how it opens up the rope cleanly and neatly every time. This allows you to put individual strands in to make a splice.